Patents by Inventor Akira Takai

Akira Takai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20070112157
    Abstract: According to the present invention, a flame retardant can be obtained, which provides a thermoplastic resin composition excellent in flame retardancy and impact resistance, and by compounding this flame retardant in thermoplastic resin, a flame retardant resin composition excellent in flame retardancy and impact resistance can be obtained. The present invention relates to a graft copolymer containing polyorganosiloxane obtained by polymerizing 0 to 10 parts by weight of a vinyl monomer (B) comprising 100 to 20% by weight of a multi-functional monomer containing at least two polymerizable unsaturated bonds in a molecule (b-1) and 0 to 80% by weight of another copolymerizable monomer (b-2) and 5 to 70 parts by weight of a vinyl monomer (C), in the presence of 30 to 95 parts by weight of polyorganosiloxane in a latex state (A), so that the total amount of polyorganosiloxane (A), vinyl monomer (B) and vinyl monomer (C) becomes 100 parts by weight.
    Type: Application
    Filed: April 9, 2004
    Publication date: May 17, 2007
    Inventors: Tomomichi Hashimoto, Akira Takai, Kazunori Saegusa, Takao Manabe, Takao Michinobu
  • Patent number: 4958606
    Abstract: A supercharged engine has a geometric compression ratio of more than 8.5, and engine specifications are set to establish a relation, Y.gtoreq.-1.75X+10, in which an intake port closing timing Y is expressed by a crank angle after the piston reaches BDC and an overlapping angle X is expressed by a crank angle for an overlapping time period during which the intake valve and exhaust valve are both open.
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: September 25, 1990
    Assignee: Mazda Motor Corporation
    Inventors: Mitsuo Hitomi, Junso Sasaki, Akira Takai, Kazuaki Umezono, Fumio Hinatase
  • Patent number: 4773377
    Abstract: An engine fuel supply control system having an air fuel ratio detector which detects the concentration of oxygen content in the engine exhaust gas and providing an air fuel ratio signal representing the air fuel ratio of the engine intake mixture. A control unit is provided to compare the air fuel ratio signal with a reference signal representing a desired air fuel ratio and adjusting the air fuel ratio by a predetermined control factor so that the actual air fuel ratio becomes closer to the desired ratio. The amount of the predetermined control factor is smaller in the engine operating condition wherein the desired air fuel ratio is relatively lean than in the engine operating condition wherein the desired air fuel ratio is relatively rich.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: September 27, 1988
    Assignee: Mazda Motor Corporation
    Inventors: Tomomi Watanabe, Akira Takai, Katsumi Okazaka
  • Patent number: 4522179
    Abstract: A multiple-displacement engine is provided with a cylinder number control means and a cylinder-reduction determination means in order to switch the operating state of the engine from the full-displacement operation to the part displacement operation or from the latter to the former according to the operating condition of the engine. A period calculating means receives signals generated from a crank angle detecting means every predetermined crank angle and calculates the time interval corresponding to the predetermined crank angle. An engine speed calculating means calculates the engine rpm on the basis of the calculated time interval or period. A crank angle determination means which receives the output from the cylinder-reduction determination means and sets the predetermined crank angle to be submitted to the period calculating means to include a crank angle corresponding to the power stroke of a working cylinder in the part-displacement state of the engine.
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: June 11, 1985
    Assignee: Mazda Motor Corporation
    Inventors: Hirofumi Nishimura, Hiroyuki Oda, Tadashi Kaneko, Akira Takai, Nobuo Takeuchi
  • Patent number: 3972882
    Abstract: Novel sym.-triazines having the formula: ##EQU1## wherein R.sup.1 is a substituted or unsubstituted alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, aralkyl or heterocyclic alkyl group; R.sup.2 is a hydrogen atom or a substituted or unsubstituted alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl or heterocyclic alkyl group; and Z.sup.1 and Z.sup.2, which may be the same or different, each represents oxygen or sulfur, have a central nerve inhibitory activity, an anti-inflammatory activity, an analgesic activity and a sedative activity, and can be prepared by reacting a 2,4-dichloro-6-substituted sym.-triazine with a compound having the formula HO--R.sup.2 in which R.sup.2 is the same as defined above.
    Type: Grant
    Filed: November 6, 1974
    Date of Patent: August 3, 1976
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Yutaka Kodama, Tsutomu Kodama, Akira Takai, Masaakira Senoura, Isao Watanabe, Katsunori Tanaka, Tomonobu Yamaguchi, Norio Abe, Takuya Kodama